scholarly journals Anaerobic Co-Digestion of Wastewater Sludge: A Review of Potential Co-Substrates and Operating Factors for Improved Methane Yield

Processes ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 39 ◽  
Author(s):  
Wei Ling Chow ◽  
Siewhui Chong ◽  
Jun Wei Lim ◽  
Yi Jing Chan ◽  
Mei Fong Chong ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Large Scale ◽  
Crude Glycerol ◽  
Waste Treatment ◽  
Agricultural Waste ◽  
Wastewater Sludge ◽  
Methane Yield ◽  
Nutrient Level ◽  
Oil And Grease ◽  
Waste Food

Anaerobic digestion has been widely employed in waste treatment for its ability to capture methane gas released as a product during the digestion. Certain wastes, however, cannot be easily digested due to their low nutrient level insufficient for anaerobic digestion, thus co-digestion is a viable option. Numerous studies have shown that using co-substrates in anaerobic digestion systems improve methane yields as positive synergisms are established in the digestion medium, and the supply of missing nutrients are introduced by the co-substrates. Nevertheless, large-scale implementation of co-digestion technology is limited by inherent process limitations and operational concerns. This review summarizes the results from numerous laboratory, pilot, and full-scale anaerobic co-digestion (ACD) studies of wastewater sludge with the co-substrates of organic fraction of municipal solid waste, food waste, crude glycerol, agricultural waste, and fat, oil and grease. The critical factors that influence the ACD operation are also discussed. The ultimate aim of this review is to identify the best potential co-substrate for wastewater sludge anaerobic co-digestion and provide a recommendation for future reference. By adding co-substrates, a gain ranging from 13 to 176% in the methane yield was accomplished compared to the mono-digestions.

Study on Solid-State Anaerobic Co-Digestion with Distiller’s Grains and Food Waste for Methane Production

2012 ◽  
Vol 485 ◽  
pp. 306-309
Author(s):  
Li Hong Wang ◽  
Qun Hui Wang ◽  
Wei Wei Cai
Keyword(s):  
Anaerobic Digestion ◽  
Solid State ◽  
Synergistic Effect ◽  
Food Waste ◽  
Methane Production ◽  
Waste Treatment ◽  
Biogas Production ◽  
Methane Yield ◽  
Kitchen Waste ◽  
Distiller's Grains

Solid-state anaerobic digestion (SSAD) of distiller’s grains (DG) and kitchen waste (KW) for biogas was investigated. Six DG to KW ratios of 10/1, 8/1, 6/1, 4/1, 1/0, and 0/1 was used. The results showed that in 48 digestion days the co-digestion with DG to KW ratio of 8:1 obtained the highest methane yield of 159.74mL/gTS, TS and VS reductions of 58.7% and 71.8%, hemicellulase, cellulose and lignin reductions of 46.7%, 45.4% and 4.0%. Compared to mono-digestions of DG or KW, co-digestion of DG and FW had a good synergistic effect. It indicated that SSAD of cellulosic-based waste and food waste could be one of the options for efficient biogas production and waste treatment

scholarly journals Enhancing methane yield from crude glycerol anaerobic digestion by coupling with ultrasound or A. niger/E. coli biodegradation

2019 ◽  
Vol 27 (2) ◽  
pp. 1461-1474 ◽  
Author(s):  
Larissa O. Paulista ◽  
Rui A. R. Boaventura ◽  
Vítor J. P. Vilar ◽  
Alexei L. N. Pinheiro ◽  
Ramiro J. E. Martins
Keyword(s):  
Anaerobic Digestion ◽  
Crude Glycerol ◽  
Methane Yield ◽  
E Coli

REDUCTION OF THE NEGATIVE IMPACT OF WASTEWATER SLUDGE ON THE SOIL BY ELECTROOSMOTIC DEHYDRATION

2021 ◽  
pp. 40-47
Author(s):  
A. O. KHOLUDENOVA ◽  
◽  
YU. EFREMOVA
Keyword(s):  
Large Scale ◽  
Waste Treatment ◽  
Negative Impact ◽  
Operating Mode ◽  
Wastewater Sludge ◽  
Technical Solution ◽  
Industrial Enterprises ◽  
Variable Voltage ◽  
Series Of Experiments ◽  
Made In

The aim of the study is to reduce the negative impact of sewage sludge from the production of cardboard and paper products on the soil by dewatering them with a dehydrator and preparing them for further disposal. Large-scale wastewater sludge from industrial enterprises during utilization is placed at disposal landfills which inevitably leads to a negative impact on the soil cover, littering of territories and withdrawal of the land fund from the economic turnover. In the course of the performed study, the well-known methods of dehydration of moisture-containing material were investigated and there was considered a technical solution to reduce the volume of formation of this type of waste using the example of cardboard and paper production. An electroosmotic installation is proposed, comprising an electrical insulation housing with electrodes: an anode made in the form of a current conductive cover and a cathode made in the form of a conductive perforated bottom of the housing which have a space between them for dehydrated waste. To study the process of sludge dewatering, a series of experiments was carried out on the dehydrator unit with variable voltage parameters between the electrodes. The results of the experimental study were the basis for statistical expressions of the mutual voltage influence between the electrodes, the duration of waste processing, the amount of removed moisture. A model has been obtained that describes the amount of moisture removed during waste treatment. The most productive operating mode of the installation, the time for treatment of waste portion have been established. It has been proven that with the help of an electroosmotic device, up to 70% of moisture is effectively removed from the volume of waste sludge. This makes it possible to significantly decrease their volumes, reduce areas for possible or temporary placement and reduce the ecological load on the environment.

Использование аппарата вихревого слоя для повышения эффективности метанового сбраживания осадков сточных вод

2019 ◽  
pp. 32-40 ◽  
Author(s):  
Y. Litti ◽  
D. Kovalev ◽  
A. Kovalev ◽  
I. Katraeva ◽  
E. Mikheeva ◽  
...  
Keyword(s):  
Organic Matter ◽  
Anaerobic Digestion ◽  
Kinetic Parameters ◽  
Wastewater Sludge ◽  
Methane Yield ◽  
Technological Parameters ◽  
Vortex Layer ◽  
Before And After ◽  
Thermophilic Conditions ◽  
Mineralization Of Organic Matter

Повышение эффективности анаэробного сбраживания осадков сточных вод, включая увеличение выхода метана и глубины минерализации органического вещества, является актуальной задачей. В ходе проведенных исследований изучалось влияние предварительной обработки осадков сточных вод в аппарате вихревого слоя ферромагнитных частиц на эффективность и кинетические параметры последующего анаэробного сбраживания осадка в термофильных условиях. Проведен анализ гранулометрического состава осадков сточных вод до и после обработки в аппарате вихревого слоя. Технологические параметры обработки осадков в аппарате вихревого слоя обусловили увеличение выхода метана на 3, степени разложения органического вещества на 8 9 и константы гидролиза на 4,7. Для оценки кинетических параметров процесса были использованы модифицированное уравнение Гомперца и уравнение первого порядка.Improving the efficiency of anaerobic digestion of wastewater sludge including methane yield and the depth of mineralization of organic matter increasing is an urgent task. As part of the study the effect of wastewater sludge pretreatment in an apparatus with vortex layer of ferromagnetic particles on the efficiency and kinetic parameters of the subsequent anaerobic digestion of the sludge under thermophilic conditions was investigated. The analysis of the particle size distribution of wastewater sludge before and after treatment in the vortex layer apparatus was carried out. The technological parameters of sludge processing in the vortex layer apparatus provided for increasing methane yield by 3, degree of decomposition of organic matter by 8 9, and hydrolysis constants by 4.7. To estimate the kinetic parameters of the process the modified Gompertz equation and the firstorder equation were used.

scholarly journals Evaluation of the Methane Production Potential of Catfish Processing Wastewater Using Various Anaerobic Digestion Strategies

Processes ◽  
2019 ◽  
Vol 7 (6) ◽  
pp. 368
Author(s):  
Mark E. Zappi ◽  
Dhan Lord Fortela ◽  
Wayne Sharp ◽  
Rakesh Bajpai ◽  
Daniel Gang ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Waste Treatment ◽  
Energy Requirement ◽  
Financial Burden ◽  
Oxygen Demand ◽  
Value Added ◽  
High Energy ◽  
Methane Yield ◽  
Wastewater Management ◽  
Simultaneous Treatment

The U.S. catfish industry is a major industry that has been declining over the years due to imports competition and growing operational costs. Catfish processing wastewater management and high energy requirement put a large financial burden on catfish processing facilities. Recovered protein-based solids have provided some value-added co-products, however, more co-products are needed to offset processing costs. Anaerobic digestion is a proven waste treatment method that produces methane, which is an energetic co-product that can be used within the processing facilities. This study was conducted to evaluate the potential of anaerobic digestion as an alternative to the currently used aerobic biotreatment of catfish processing wastewater. Initial assessments indicated the recalcitrance of the full-strength wastewater to anaerobic digestion, yielding only ~4 m3 per ton (U.S.) of input chemical oxygen demand (CODinput). Thus, several strategies were evaluated to improve the methane yield from the wastewater. These strategies include nutrient (nitrogen and sulfur) amendment, along with ozone, HCl, and NaOH pretreatment. The results showed that nutrient amendment was the most suitable strategy for improving the digestibility of the catfish processing wastewater. A methane yield of 121–236 m3/ton (U.S.) CODinput was obtained, with a purity of 67–80 vol.%. These results are similar to yields and purities of biogas from other feedstock, such as food waste, wastewater solids, and fish canning wastewater. This indicates that anaerobic digestion could be a viable alternative for simultaneous treatment and energetic co-product generation from catfish processing wastewater.

scholarly journals Potential of biogas production from anaerobic co-digestion of fat, oil and grease waste and food waste

2018 ◽  
Vol 67 ◽  
pp. 02047 ◽  
Author(s):  
Reigina Sandriaty ◽  
Cindy Priadi ◽  
Septiana Kurnianingsih ◽  
Ayik Abdillah
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Biogas Production ◽  
Potential Method ◽  
Methane Yield ◽  
Volatile Solid ◽  
Oil And Grease ◽  
Biochemical Methane Potential ◽  
Digestion Process ◽  
Methane Potential

The generation of fat, oil and grease (FOG) waste can be a nuisance hazard, but also a potential for resource recovery. FOG waste can be utilized as nutrient and energy source through anaerobic digestion which may increase methane yield but also increase presence of inhibitors. Using the biochemical methane potential method, this research is aimed to determine the effect of FOG waste in the co-digestion process of food waste (FW) to produce biogas. The research was conducted for 42 days at 37°C using FOG waste codigested with FW of 3 different volatile solid (VS) rasio which are 0.125, 0.3, and 0.5. The results showed that FOG waste combined with FW has a methane yield that may reach up to 485 ± 36.8 mL CH4/gr VS, the highest one produced by the 0.125 VS rasio mix. While the ratio of FOG waste with FW at 0.3 and 0.5 only produce 128 ± 195 and 4 ± 1.45 mL CH4/gr VS, respectively. The ratio of 0.125 also demonstrates the highest COD reduction of 56% compared to the other ratio which indicates the 0.125 FOG and FW ratio can be implemented to utilize FOG waste and increase methane yield during anaerobic digestion process.

scholarly journals Economic Perspectives of Biogas Production via Anaerobic Digestion

2020 ◽  
Vol 7 (3) ◽  
pp. 74 ◽  
Author(s):  
Arpit H. Bhatt ◽  
Ling Tao
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Swine Manure ◽  
Cost Savings ◽  
Wastewater Sludge ◽  
Waste To Energy ◽  
Small Scale ◽  
Oil And Grease ◽  
Potential Cost ◽  
The Cost

As the demand for utilizing environment-friendly and sustainable energy sources is increasing, the adoption of waste-to-energy technologies has started gaining attention. Producing biogas via anaerobic digestion (AD) is promising and well-established; however, this process in many circumstances is unable to be cost competitive with natural gas. In this research, we provide a technical assessment of current process challenges and compare the cost of biogas production via the AD process from the literature, Aspen Plus process modeling, and CapdetWorks software. We also provide insights on critical factors affecting the AD process and recommendations on optimizing the process. We utilize four types of wet wastes, including wastewater sludge, food waste, swine manure, and fat, oil, and grease, to provide a quantitative assessment of theoretical energy yields of biogas production and its economic potential at different plant scales. Our results show that the cost of biogas production from process and economic models are in line with the literature with a potential to go even lower for small-scale plants with technological advancements. This research illuminates potential cost savings for biogas production using different wastes and guide investors to make informed decisions, while achieving waste management goals.

Assessment of bioenergy development potential in agricultural enterprises

2020 ◽  
pp. 165-171
Author(s):  
Iryna Hryhoruk
Keyword(s):  
Renewable Energy ◽  
Large Scale ◽  
Agricultural Waste ◽  
General Structure ◽  
Geographical Location ◽  
Economic Assessment ◽  
Energy Resources ◽  
Industrial Complex ◽  
Renewable Energy Resources ◽  
Energy Potential

Exhaustion of traditional energy resources, their uneven geographical location, and catastrophic changes in the environment necessitate the transition to renewable energy resources. Moreover, Ukraine's economy is critically dependent on energy exports, and in some cases, the dependence is not only economic but also political, which in itself poses a threat to national security. One of the ways to solve this problem is the large-scale introduction and use of renewable energy resources, bioenergy in particular. The article summarizes and offers methods for assessing the energy potential of agriculture. In our country, a significant amount of biomass is produced every year, which remains unused. A significant part is disposed of due to incineration, which significantly harms the environment and does not allow earning additional funds. It is investigated that the bioenergy potential of agriculture depends on the geographical distribution and varies in each region of Ukraine. Studies have shown that as of 2019 the smallest share in the total amount of conventional fuel that can be obtained from agricultural waste and products suitable for energy production accounts for Zakarpattya region - 172.5 thousand tons. (0.5% of the total) and Chernivtsi region - 291.3 thousand tons. (0.9%). Poltava region has the greatest potential - 2652.2 thousand tons. (7.8%) and Vinnytsia - 2623.7 thousand tons. (7.7%). It should be noted that the use of the energy potential of biomass in Ukraine can be called unsatisfactory. The share of biomass in the provision of primary energy consumption is very small. For bioenergy to occupy its niche in the general structure of the agro-industrial complex, it is necessary to develop mechanisms for its stimulation. In addition, an effective strategy for the development of the bioenergy sector of agriculture is needed. The article considers the general energy potential of agriculture, its indicative structure. The analysis is also made in terms of areas. In addition, an economic assessment of the possible use of existing potential is identified.

Biogas Production Using Anaerobic Digestion of Industrial Waste

2016 ◽  
Vol 832 ◽  
pp. 55-62
Author(s):  
Ján Gaduš ◽  
Tomáš Giertl ◽  
Viera Kažimírová
Keyword(s):  
Anaerobic Digestion ◽  
Industrial Waste ◽  
Large Scale ◽  
Biogas Production ◽  
Biogas Plant ◽  
Parallel Operation ◽  
Paper Production ◽  
Biochemical Conversion ◽  
Mixed Biomass ◽  
Economic Balance

In the paper experiments and theory of biogas production using industrial waste from paper production as a co-substrate are described. The main aim of the experiments was to evaluate the sensitivity and applicability of the biochemical conversion using the anaerobic digestion of the mixed biomass in the pilot fermentor (5 m3), where the mesophillic temperature was maintained. It was in parallel operation with a large scale fermentor (100 m3). The research was carried out at the biogas plant in Kolíňany, which is a demonstration facility of the Slovak University of Agriculture in Nitra. The experiments proved that the waste arising from the paper production can be used in case of its appropriate dosing as an input substrate for biogas production, and thus it can improve the economic balance of the biogas plant.

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